| dc.description.abstract | Triaxial compression tests were preformed such that
changes in the magnetic susceptibility anisotropy with strain
would be represented by experimental approximations of simple
shear and pure shear. Both types of tests were performed on
artificial materials of high magnetic susceptibility at room
temperature and atmospheric pore fluid pressure. Experimental
displacement-rates and strain-rates were computer controlled
during testing.
Two different shear zone materials were employed for the
"simple shear" testing, a sand-cement mixture and a
calcite-cement mixture. Three series of simple shear tests
were conducted on the sand-cement material at various
confining pressures; Series A, at 0.689 kbars, Series B at 1.0
kbar and Series C at 1.5 kbars. Two series of simple shear tests
were conducted on the calcite-cement material, Series 1, at
1.0 kbar confining pressure and Series 2 at 1.5 kbars Pc. For
both materials a constant axial displacement-rate of 5.0x10-6
inches, s-1 (corresponding to a slip displacement-rate on the
shear zone walls of 8.7x10-6 inches, s-1) was employed. | |
